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<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="asio.reference.basic_seq_packet_socket.lowest_layer_type"></a><a class="link" href="lowest_layer_type.html" title="basic_seq_packet_socket::lowest_layer_type">basic_seq_packet_socket::lowest_layer_type</a>
</h4></div></div></div>
<p>
          <span class="emphasis"><em>Inherited from basic_socket.</em></span>
        </p>
<p>
          <a class="indexterm" name="asio.indexterm.basic_seq_packet_socket.lowest_layer_type"></a> 
A
          <a class="link" href="../basic_socket.html" title="basic_socket"><code class="computeroutput">basic_socket</code></a>
          is always the lowest layer.
        </p>
<pre class="programlisting">typedef basic_socket&lt; Protocol &gt; lowest_layer_type;
</pre>
<h6>
<a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.h0"></a>
          <span><a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.types"></a></span><a class="link" href="lowest_layer_type.html#asio.reference.basic_seq_packet_socket.lowest_layer_type.types">Types</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Name
                  </p>
                </th>
<th>
                  <p>
                    Description
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/broadcast.html" title="basic_socket::broadcast"><span class="bold"><strong>broadcast</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option to permit sending of broadcast messages.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/bytes_readable.html" title="basic_socket::bytes_readable"><span class="bold"><strong>bytes_readable</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    IO control command to get the amount of data that can be read
                    without blocking.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/debug.html" title="basic_socket::debug"><span class="bold"><strong>debug</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option to enable socket-level debugging.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/do_not_route.html" title="basic_socket::do_not_route"><span class="bold"><strong>do_not_route</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option to prevent routing, use local interfaces only.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/enable_connection_aborted.html" title="basic_socket::enable_connection_aborted"><span class="bold"><strong>enable_connection_aborted</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option to report aborted connections on accept.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/endpoint_type.html" title="basic_socket::endpoint_type"><span class="bold"><strong>endpoint_type</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    The endpoint type.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/executor_type.html" title="basic_socket::executor_type"><span class="bold"><strong>executor_type</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    The type of the executor associated with the object.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/keep_alive.html" title="basic_socket::keep_alive"><span class="bold"><strong>keep_alive</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option to send keep-alives.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/linger.html" title="basic_socket::linger"><span class="bold"><strong>linger</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option to specify whether the socket lingers on close
                    if unsent data is present.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/lowest_layer_type.html" title="basic_socket::lowest_layer_type"><span class="bold"><strong>lowest_layer_type</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    A basic_socket is always the lowest layer.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/message_flags.html" title="basic_socket::message_flags"><span class="bold"><strong>message_flags</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Bitmask type for flags that can be passed to send and receive
                    operations.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/native_handle_type.html" title="basic_socket::native_handle_type"><span class="bold"><strong>native_handle_type</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    The native representation of a socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/out_of_band_inline.html" title="basic_socket::out_of_band_inline"><span class="bold"><strong>out_of_band_inline</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option for putting received out-of-band data inline.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/protocol_type.html" title="basic_socket::protocol_type"><span class="bold"><strong>protocol_type</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    The protocol type.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/receive_buffer_size.html" title="basic_socket::receive_buffer_size"><span class="bold"><strong>receive_buffer_size</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option for the receive buffer size of a socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/receive_low_watermark.html" title="basic_socket::receive_low_watermark"><span class="bold"><strong>receive_low_watermark</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option for the receive low watermark.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/reuse_address.html" title="basic_socket::reuse_address"><span class="bold"><strong>reuse_address</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option to allow the socket to be bound to an address that
                    is already in use.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/send_buffer_size.html" title="basic_socket::send_buffer_size"><span class="bold"><strong>send_buffer_size</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option for the send buffer size of a socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/send_low_watermark.html" title="basic_socket::send_low_watermark"><span class="bold"><strong>send_low_watermark</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Socket option for the send low watermark.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/shutdown_type.html" title="basic_socket::shutdown_type"><span class="bold"><strong>shutdown_type</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Different ways a socket may be shutdown.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/wait_type.html" title="basic_socket::wait_type"><span class="bold"><strong>wait_type</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Wait types.
                  </p>
                </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.h1"></a>
          <span><a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.member_functions"></a></span><a class="link" href="lowest_layer_type.html#asio.reference.basic_seq_packet_socket.lowest_layer_type.member_functions">Member
          Functions</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Name
                  </p>
                </th>
<th>
                  <p>
                    Description
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/assign.html" title="basic_socket::assign"><span class="bold"><strong>assign</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Assign an existing native socket to the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/async_connect.html" title="basic_socket::async_connect"><span class="bold"><strong>async_connect</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Start an asynchronous connect.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/async_wait.html" title="basic_socket::async_wait"><span class="bold"><strong>async_wait</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Asynchronously wait for the socket to become ready to read, ready
                    to write, or to have pending error conditions.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/at_mark.html" title="basic_socket::at_mark"><span class="bold"><strong>at_mark</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Determine whether the socket is at the out-of-band data mark.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/available.html" title="basic_socket::available"><span class="bold"><strong>available</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Determine the number of bytes available for reading.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/basic_socket.html" title="basic_socket::basic_socket"><span class="bold"><strong>basic_socket</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Construct a basic_socket without opening it. <br> <span class="silver"> &#8212;</span><br> Construct
                    and open a basic_socket. <br> <span class="silver"> &#8212;</span><br> Construct a basic_socket,
                    opening it and binding it to the given local endpoint. <br>
                    <span class="silver"> &#8212;</span><br> Construct a basic_socket on an existing native socket.
                    <br> <span class="silver"> &#8212;</span><br> Move-construct a basic_socket from another. <br>
                    <span class="silver"> &#8212;</span><br> Move-construct a basic_socket from a socket of another
                    protocol type.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/bind.html" title="basic_socket::bind"><span class="bold"><strong>bind</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Bind the socket to the given local endpoint.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/cancel.html" title="basic_socket::cancel"><span class="bold"><strong>cancel</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Cancel all asynchronous operations associated with the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/close.html" title="basic_socket::close"><span class="bold"><strong>close</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Close the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/connect.html" title="basic_socket::connect"><span class="bold"><strong>connect</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Connect the socket to the specified endpoint.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/get_executor.html" title="basic_socket::get_executor"><span class="bold"><strong>get_executor</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Get the executor associated with the object.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/get_io_context.html" title="basic_socket::get_io_context"><span class="bold"><strong>get_io_context</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    (Deprecated: Use get_executor().) Get the io_context associated
                    with the object.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/get_io_service.html" title="basic_socket::get_io_service"><span class="bold"><strong>get_io_service</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    (Deprecated: Use get_executor().) Get the io_context associated
                    with the object.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/get_option.html" title="basic_socket::get_option"><span class="bold"><strong>get_option</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Get an option from the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/io_control.html" title="basic_socket::io_control"><span class="bold"><strong>io_control</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Perform an IO control command on the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/is_open.html" title="basic_socket::is_open"><span class="bold"><strong>is_open</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Determine whether the socket is open.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/local_endpoint.html" title="basic_socket::local_endpoint"><span class="bold"><strong>local_endpoint</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Get the local endpoint of the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/lowest_layer.html" title="basic_socket::lowest_layer"><span class="bold"><strong>lowest_layer</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Get a reference to the lowest layer. <br> <span class="silver"> &#8212;</span><br> Get a const
                    reference to the lowest layer.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/native_handle.html" title="basic_socket::native_handle"><span class="bold"><strong>native_handle</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Get the native socket representation.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/native_non_blocking.html" title="basic_socket::native_non_blocking"><span class="bold"><strong>native_non_blocking</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Gets the non-blocking mode of the native socket implementation.
                    <br> <span class="silver"> &#8212;</span><br> Sets the non-blocking mode of the native socket
                    implementation.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/non_blocking.html" title="basic_socket::non_blocking"><span class="bold"><strong>non_blocking</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Gets the non-blocking mode of the socket. <br> <span class="silver"> &#8212;</span><br> Sets
                    the non-blocking mode of the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/open.html" title="basic_socket::open"><span class="bold"><strong>open</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Open the socket using the specified protocol.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/operator_eq_.html" title="basic_socket::operator="><span class="bold"><strong>operator=</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Move-assign a basic_socket from another. <br> <span class="silver"> &#8212;</span><br> Move-assign
                    a basic_socket from a socket of another protocol type.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/release.html" title="basic_socket::release"><span class="bold"><strong>release</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Release ownership of the underlying native socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/remote_endpoint.html" title="basic_socket::remote_endpoint"><span class="bold"><strong>remote_endpoint</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Get the remote endpoint of the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/set_option.html" title="basic_socket::set_option"><span class="bold"><strong>set_option</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Set an option on the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/shutdown.html" title="basic_socket::shutdown"><span class="bold"><strong>shutdown</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Disable sends or receives on the socket.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/wait.html" title="basic_socket::wait"><span class="bold"><strong>wait</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Wait for the socket to become ready to read, ready to write,
                    or to have pending error conditions.
                  </p>
                </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.h2"></a>
          <span><a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.protected_member_functions"></a></span><a class="link" href="lowest_layer_type.html#asio.reference.basic_seq_packet_socket.lowest_layer_type.protected_member_functions">Protected
          Member Functions</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Name
                  </p>
                </th>
<th>
                  <p>
                    Description
                  </p>
                </th>
</tr></thead>
<tbody><tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/_basic_socket.html" title="basic_socket::~basic_socket"><span class="bold"><strong>~basic_socket</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Protected destructor to prevent deletion through this type.
                  </p>
                </td>
</tr></tbody>
</table></div>
<h6>
<a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.h3"></a>
          <span><a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.data_members"></a></span><a class="link" href="lowest_layer_type.html#asio.reference.basic_seq_packet_socket.lowest_layer_type.data_members">Data
          Members</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Name
                  </p>
                </th>
<th>
                  <p>
                    Description
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/max_connections.html" title="basic_socket::max_connections"><span class="bold"><strong>max_connections</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    (Deprecated: Use max_listen_connections.) The maximum length
                    of the queue of pending incoming connections.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/max_listen_connections.html" title="basic_socket::max_listen_connections"><span class="bold"><strong>max_listen_connections</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    The maximum length of the queue of pending incoming connections.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/message_do_not_route.html" title="basic_socket::message_do_not_route"><span class="bold"><strong>message_do_not_route</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Specify that the data should not be subject to routing.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/message_end_of_record.html" title="basic_socket::message_end_of_record"><span class="bold"><strong>message_end_of_record</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Specifies that the data marks the end of a record.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/message_out_of_band.html" title="basic_socket::message_out_of_band"><span class="bold"><strong>message_out_of_band</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Process out-of-band data.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <a class="link" href="../basic_socket/message_peek.html" title="basic_socket::message_peek"><span class="bold"><strong>message_peek</strong></span></a>
                  </p>
                </td>
<td>
                  <p>
                    Peek at incoming data without removing it from the input queue.
                  </p>
                </td>
</tr>
</tbody>
</table></div>
<p>
          The <a class="link" href="../basic_socket.html" title="basic_socket"><code class="computeroutput">basic_socket</code></a>
          class template provides functionality that is common to both stream-oriented
          and datagram-oriented sockets.
        </p>
<h6>
<a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.h4"></a>
          <span><a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.thread_safety"></a></span><a class="link" href="lowest_layer_type.html#asio.reference.basic_seq_packet_socket.lowest_layer_type.thread_safety">Thread
          Safety</a>
        </h6>
<p>
          <span class="emphasis"><em>Distinct</em></span> <span class="emphasis"><em>objects:</em></span> Safe.
        </p>
<p>
          <span class="emphasis"><em>Shared</em></span> <span class="emphasis"><em>objects:</em></span> Unsafe.
        </p>
<h6>
<a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.h5"></a>
          <span><a name="asio.reference.basic_seq_packet_socket.lowest_layer_type.requirements"></a></span><a class="link" href="lowest_layer_type.html#asio.reference.basic_seq_packet_socket.lowest_layer_type.requirements">Requirements</a>
        </h6>
<p>
          <span class="emphasis"><em>Header: </em></span><code class="literal">asio/basic_seq_packet_socket.hpp</code>
        </p>
<p>
          <span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio.hpp</code>
        </p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2018 Christopher M. Kohlhoff<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
</tr></table>
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